Senior Software Engineer

• Actively participate in all Scrum ceremonies, including sprint planning, daily stand-ups, reviews, and retrospectives.
• Serve as a technical leader and mentor to SE1, SE2, and SE3 engineers through code reviews, pairing, and coaching.
• Contribute to architectural decisions, technical roadmaps, and cross-team technical standards.
• Own and enforce security best practices across the engineering team; lead security reviews and threat modeling for new systems and major changes.
• Lead on-call rotation; own incident response from detection through resolution and retrospective, and drive systemic improvements to prevent recurrence.
• Own comprehensive technical documentation for all systems and architectures within your domain, and set documentation standards for the broader team.
• Collaborate cross-functionally to deliver functional, performant, and secure end-to-end solutions.
• Partner with Product Owners and stakeholders to clarify requirements, manage scope, and drive delivery.
• Works with manager to set and pursue quarterly development goals.
• Live and model Trinity's Core Values in daily work.
• Participate in special projects and handle all other assigned duties as required.

• Education: BA/BS (4-year degree) in Computer Science, Software Engineering, or related field, or equivalent work experience.
• Experience: 5+ years of professional software development experience with demonstrated growth in scope and complexity, or demonstrated equivalent competency.
• Programming: Strong proficiency in JavaScript/TypeScript, Angular, Java, and Spring Boot.
• Environment: Hands-on experience with AWS, Docker, and Kubernetes; working knowledge of Terraform for infrastructure as code.
• Database: Strong understanding of relational databases and writing efficient SQL.
• Web: Solid experience with HTML5, CSS3, and pre-processors such as SASS/LESS.
• APIs: Proven experience designing, building, and consuming RESTful APIs.
• Security: Strong knowledge of secure coding practices, OWASP standards, and experience leading security reviews.
• Process: Strong experience working in an Agile/Scrum environment, including contributing to ceremonies and process improvement.
• Tools: Proficiency with Git and Atlassian tooling including Jira, Confluence, and Bitbucket.
• Demonstrated experience mentoring engineers and contributing to a strong team culture.
• A "We Not Me" attitude with strong communication and collaboration skills.
• A "Make It Happen" mindset and a passion for solving complex problems.
• Excellent verbal and written communication skills.
• Strong computer skills including Microsoft Word and Excel.
• Proficiency with AI-assisted development tools and ability to guide the team in their responsible and effective use (e.g., Claude, Copilot).
• Participates in training, continuing education, or continuous improvement as approved by your manager.
• Some travel required.
• Commitment to living Company Core Values.

System One, and its subsidiaries including Joulé and Mountain Ltd., are leaders in delivering outsourced services and workforce solutions across North America. We help clients get work done more efficiently and economically, without compromising quality. System One not only serves as a valued partner for our clients, but we offer eligible employees health and welfare benefits coverage options including medical, dental, vision, spending accounts, life insurance, voluntary plans, as well as participation in a 401(k) plan.

System One is an Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex (including pregnancy, childbirth, or related medical conditions), sexual orientation, gender identity, age, national origin, disability, family care or medical leave status, genetic information, veteran status, marital status, or any other characteristic protected by applicable federal, state, or local law.

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